长期水浸焦煤风干氧化自燃特性研究
发布时间：2018-08-09 18:34
【摘要】：采空区遗煤被水长期浸泡之后,当水分被排除会更容易自燃。为了研究焦煤长期水浸后自燃特性变化,以西曲矿4~#煤为研究对象,对煤样用蒸馏水浸泡30~90 d,在25℃条件下真空干燥箱内干燥72 h后,采取程序升温、红外光谱、比表面积和孔隙分析等测试对比原煤和经过不同浸水时间的焦煤的氧化自燃特性。结果表明:水浸风干后的煤样的自燃特性增强,氧化升温会产生更多的CO、CO_2等产物,孔隙和裂隙增加,孔直径、比表面积和孔体积随浸泡时间增长而增大,但增加的幅度逐渐减小;-OH、-CH_2、-CH_3、C=O等有利于煤自燃活性基团增多。长期水浸对焦煤自燃具有一定的促进作用。
[Abstract]:After long-term soaking in goaf coal, it is easier to spontaneous combustion when water is removed. In order to study the change of spontaneous combustion characteristics of coal after long-term water leaching, Xiqu No. 4 coal was used as the object of study. The coal samples were soaked in distilled water for 30 ~ 90 days and dried in a vacuum dryer at 25 鈩，
本文编号：2174945
[Abstract]:After long-term soaking in goaf coal, it is easier to spontaneous combustion when water is removed. In order to study the change of spontaneous combustion characteristics of coal after long-term water leaching, Xiqu No. 4 coal was used as the object of study. The coal samples were soaked in distilled water for 30 ~ 90 days and dried in a vacuum dryer at 25 鈩，
本文编号：2174945
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